Windows 10 nrf51822 connection failure

[Lodge]

Hi,

Our system was working fine under Windows 8.1, but now we have upgraded we are having connection issues.

Our nrf device uses no security, and Windows 10 tries to constantly connect to our device when bluetooth is on.

I am using Softdevice 110 and SDK 12.3.0.

What happens is I get the following connection states:

- BLE_GAP_EVT_CONNECTED (setting connection handle to zero)

- BLE_GAP_EVT_SEC_INFO_REQUEST (encryption key is null)

- BLE_GAP_EVT_DISCONNECTED (setting connection handle invalid)

This process continually happens, so when I view the connection on Bluetooth LE Explorer,

it shows Connected: False/True alternating

Can anyone help?

Much appreciated.

[Lodge]

Hi,

From my wireshark trace, seems I am getting the same result as this post-

https://devzone.nordicsemi.com/f/nordic-q-a/3672/why-am-i-seeing-an-ll_reject_ind-from-the-slave-intermittently/13335#13335

I am sending a sd_ble_gap_sec_info_reply with NULL security and I am seeing the LL_REJECT_IND followed by LL_TERMINATE_IND.

Thanks.

[Øyvind]

Hello, 

Sorry for the late reply. Unfortunately, there have been some issues from time to time with Windows and Bluetooth. Have you tried to debug, to see exactly where this happens?

Could you please upload the Wireshark trace?

Thanks!

Kind regards,
Øyvind